USDA Cymbopogon Citratus Herbal Supplement Non-Irradiated Kosher Lemongrass has a fresh, light, lemony flavor and scent that is a staple in many ethnic cuisines, including Thai, Vietnamese, and Indonesian. It's also used in hair and skin care products and for scenting perfumes and room sprays. Lemongrass herb is best known for its use as a tasty tea, by itself or in combination with other herbs. It makes an ideal, appetite-promoting, before-dinner tea, as well as a tummy-soothing, after-the-meal tea.